Varnish-gum and producing same.



- UNITED SA JOHN JACOB KESSLER, OF ST. LOUIS, MISSOURI.

VARNISH-GUM AND PRODUCING SA.

Specification of Letters Patent.

Patented May 25, 1909.

Application filed August s, 1908. Serial No. 446,553.

- T all whom it may concern:

Be it known that I, JOHN'JACOB KESSLER, a citizen of the UnitedStates, residing at St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Varnish-Gum and Producing Same, of which the following is a specification.

The object of my invention is to roduce a varnish which has the quality of drying rapidly and being insoluble in ordinary petroleum products, a subsidiary object of the invention being to produce a peculiar gum from which the aforesaid varnish can be produced.

In producing my improved varnish material, I take a resinous gum, such for instance as ordinary rosin, kauri, Manila gum, etc. and either pulverize it or dissolve it in a solvent on which nitric acid has little or no action. Such a solvent is found in several of the petroleum products, such for instance as naphtha. After the material has been pulverized or dissolved, as above described, I submit the same to a bath of nitric acid which may be of any desired strength although I find that the most practical and commercial results are produced with concentrated nitric acid approximating a specific gravity of 1.40. If less concentrated nitric-acid is used it may be advisable to apply some heat to the material during the nitric acid action. I also find it advisable to use a slight excess of acid as any unused acid may be readily recovered and used again. Upon mixing .the'inredients a reaction sometimes immediately egins ifthe temperature be that of an ordinary summer day. The reaction may be started either by the application of external heat or by inserting a hot iron into. the mixture, whereupon a reaction will commence at the point of insertion and proceed through. When the reaction has.

the whole mixture. been practically completed, as indicated by a fall in temperature of the reacting mass,

the solid residuum is taken out and washed thoroughly in clear water until the Washing water is free from nitric acid. The mass is then spread out and thoroughly dried in the sun, or in any other suitable manner.

suitable solvent such as wood or grain alcohol, much as shellac, and the resulting li uid Theproduct when dried may be dissolved in a over with an ordinary oil varnish without softening.

In practice I have found very satisfactory results to be obtained from ordinary rosin, but there are many other resinous gums with which satisfactory results may be obtained.

I claim as my invention v 1. A varnish resulting from the treatment of a resinous gum with nitric acid, the subsequent thorough washing and drying oof-the product, and the subse uent solution, (if such product in a suitable-so vent.

2. A varnish resulting from the treatment of rosin with nitric acid, the thorough washing and drying of the roduct, and the subsequent solution of suc product in a suitablesolvent. I

3. A varnish resulting from the treatment of rosin with nitric acid, the subsequent thorough washing and drying of the product, and thesubsequent solution of such product 'in an alcohol. 7

4. That improvement in the art of producing varnish. gums which comprises the treatment of a resinous gum with nitric acid, thoroughly washing out the acid from the product and drying said product to produce the varnish gum.

5. That improvement in the art of producingvarnishgums which comprises the treatment of rosin with nitric acid, thoroughly washing out the acid from the product and drying said product to produce the varnish 6. Thatimprovement in the art of producing varnishes which comprises the solution of a resinous gum in a solvent substantlally unafi ected by nitric acid, subjecting such solution to the action of nitric acid, removing the excess acid from the roduct by washing, drying the product, and dissolving the same in a solvent. I

7. That improvement in the art of producing varnishes which comprises the solution of rosin in a solvent substantially unaffected by nitric acid, subjecting such solution to the action of nitric acid, removing the excess acid from the product by washlng, drying the product, and dissolving the same in a solvent.

8. That improvement in the art of producing varnishes which comprises the solution of a resinous gum in a petroleum product such vas fiaphtha, subjecting the solution to nitric aci 9. That improvement in the art of producing varnishes which comprises the solution of a petroleum product, such as naph -tha and subjectingthesolution to nitric 'f- 10. Thatimproyeme'nt in the. art of pro'- ducin varnishes which comprises the solution 0 are'sinous gum in'a petroleum product such as naphtha, subjecting the solution to nitric acid, wash'mf out the excess acid from the resulting soli 10 "ducing 11. That improvementin theart of provarnishes which comprises the solution 0 rosin in a petroleum product such as dryin such solid and dissolving thesame in a su itable solvent.

na hthaQsuBjectin' the solution to nitric acid, washing out t e excess acid from the resulting .sohd; drying such solid,- and dissolving the same in a suitable solvent.- In witness whereof, I have hereunto set my hand and seal at St. Louis, Missouri, this .25th day of Jul A.- D. one thousand nine lm- H hundred and eig JOHNIJACOBQKESSILERJ 8.]

Witness'es:

GARRELS, JACOB :KESSLER. a 

